i have a WDSR2120J9WW GE washer (top loader) that is having problems with the spin cycle. it washes well but the spin cycle spins the bucket very slowly or, if loaded, not at all. in empty it spins without problems. when there are clothes in it and it does manage to spin, it makes pretty loud noises (sounds like bearings). i have tried to grease the bearing track and that has helped but we're still having problems. any ideas? thanks folks!

What "bearing track" are you referring to? Rotate the motor pulley CW (viewed from below) using both hands to keep it going. It should be relatively easy, transmission and basket should rotate. Run it in spin mode for several minutes while empty. After it stops, feel the lower fixed transmission housing directly below the rotating part of the transmission. If it is hot to the touch, the lower bearing may be failing or the brake is not fully releasing.

the bearing track i'm referring to is on the underside of the large pulley and just above the spring where the bearings sit. i read elsewhere that those bearings can become seized b/c apparently they change positions when the washer is washing vs. spinning. the grease helped (some) but there are still problems with getting it to spin.

Yes, the grease in there can dry up and prevent the brake from releasing. In the photo, you should see the cam dog rotate towards and engage with the brake hub dog during spin. This causes the 6 ball bearings to move into the shallow portion of the grooves that they are in which causes them to push up on the brake hub releasing the brake. You will likely need a mirror to see up there. There's also the possibility that the spring is broken or lubricant has gotten inside the spring causing it to slip.

You shouldn't use oil, you use grease. It's common for the grease in the brake release mechanism to dry up due to age and heat and cause problems. A new transmission comes with grease inside the lower bearing as well as in the brake release mechanism. While this transmission is not normally considered serviceable, if you have mechanical skills, it can be done. Iv'e overhauled brake release mechanism's and replaced the lower bearing in them. It's not that difficult and is far cheaper than a new transmission.

On my GE top-loader, the agitator wouldn't agitate. I could turn the agitator by hand very freely. Turns out the agitator coupler was bad. Cost me about $25 to fix. Pull the agitator straight up (if yours is the same as mine) and it will come completely out of the washer. You will see a bolt on top of the coupler that holds the coupler to the shaft. Take out the bolt and the coupler will pull straight up, off the shaft. If the grooves are "worn down", then the agitator is probably slipping as the shaft turns the coupler. This could make some sound, initially, until it's worn down pretty badly. Replace the coupler and the agitator will work fine, again.